Moved to Help for not following the bug report, and because at least part of it isn’t a bug.
It’s expected that a file with > in the name won’t sync, because it’s not allowed in filenames on Windows. Can you confirm that a file with its name containing only letters and - doesn’t sync? That character should work on any system.
I believe there is a feature request in the forum asking for Sync to notify about this (or about errors in general, or about other errors) instead of just logging it. You can add feedback there to show your support for it.